Calender



Jan. 25, 1927. T MIDGLEY 1,615,475

CALENDER Filed May 10, 1926 2 Sheets-Sheet 1 INVENTOR.

Jan. 25 192 7 T. MIDGLEY o CALENDER Filed May 10. 192.6 2 Sheets-Sheet 2,

a? I g 1 ATT.

\\ I F 1 v INVENTOR.

V2517 072w BY p i Patented Jan. 25, 1927.

UNITED. STATES 1,615,475 PATENT OFFICE.

THOMAS MIDGLEY, OF BAMPDEN, MASSACHUSETTS, ASSIGNOR TO THE FISK RUBBER- COMPANY, OF CHICOPEE FALLS, MASSACHUSETTS, A CORPORATION OF MASSA- 'CHUSETTS.

- 'Appli'cati on filed sta 10,

This invention relates to improvements in the construction of calenders, particularly of the type adapted for the sheeting of rubber stoc 5 In' my prior Patent 1,500,67 9, granted July 8, 1924, I have described a calendar having four rolls 'infvertical stack formation provided with means" for adjusting the vertical position .of three of these rolls iii-- dependently of each other.-

In the calender described in my patent, the bottom roll of the stack was vertically adjustable, the next to the bottom roll fixed in position, the third from the bottom iroll fixed in a ertically adjustable slide, and'the upper roll vertically adjustable inthe slide carrying the third roll. 'It has been found that some inequalities in the gauge of the rubber sheet delivered between thetwo central rolls result from this construction,.due to the fact that the slide carrying the two upper rolls is forced downwardly by its weight and upwa'rdly by the reaction of the rubber sheet passing between the two central: rolls. These forces beingin opposite directions, and the upward pressure exerted by the rub-' ber sheet varying somewhat on account of momentary changes in the stiffness of the rubber sheet, any lost motion in the adjusting means will permit vertical play of the 1 slide. It is the object of the present invention to avoid these difiiculties and to producea calender which will still possess all the advantages of that-described in my prior patentv as to ease of adjustment.

Referring to the drawings, V Fig. 1 is a front elevation of my improved calender, partly broken away;

Fig. 2 is a section on line 2-2 of Fig. 1;

Fig. 3 is a section on line 3-3 of Fig. 1;

gig. 4 is a section on line 4-4 of Fig. 2; an

Fig. 5 is a section on line '55 of Fig. 2. The calender shown in the drawings has 46 four rolls 10, 11, 12 and 13 journaled, as willbe described; in a frame 14. Roll 11 is journaled in boxes 15, fitting in .slideways- 16 in the'frame and restrained from vertical motion,'downwardly as by shoulders 17 on the slideways and upwardly as by a plate 18 slidable transversely in grooves 19. The roll 11 is thus maintained permanently in position, bein free to rotate but being restrained against any vertical movement.

" onnnnmm.

1926. Serial No. 108,082.

Roll 10 is journaled in boxes 20 slidable vertically in slideways 16. Roll 12 is journaled in secondary frames 21mounted for vertical motion in the slideways 16 and themselves having slideways 22 in which are mounted for vertical reciprocation journal boxes 23 carrying the roll 13.

Boxes 20 are each fitted with a cap 24 receiving an enlarged end 25 of a post 26 which has threaded engagement with the adjacent top piece 27 of the frame. Each post 26 is fitted with a worm wheel 28 meshing with a worm 29 on a cross shaft 30 connected by gearing 31 with hand wheel 32.

By turning the hand wheel the two posts 26 can be rotated simultaneously, raising or lowering the boxes 20 the desired amount.

Each slide 21 is fitted at its bottom with a cross piece 33 having a cap'34 receiving an enlargement 35 of a post 36 having threaded engagement with the main frame 14. Each post has secured to it a worm wheel 37 meshing with a worm 38 on a cross shaft 39 having geared connection 40 with a hand wheel 41. By rotating this hand wheel the slides 21 can besimultaneously raised and lowered,

carrying with them the rolls 12 and 13 without changing the adjustment of these rolls with respect to each other.

Threaded through the cross pieces 33 are posts 42, serving as abutments upon which the journal boxes 23 rest; These posts pass freely through the posts 36 and carry at their lower endsworzn wheels 43 meshing with worms 44 upon a cross shaft 45 having geared connection-46 with a hand wheel 47.

The worm wheels 43 and the worms 44 are designed sothey may have a slight vertical motion. relative'to each other without disturbing the meshing of-gtheir teeth. By

turning the han'dwheel 47. the journal boxes 23 will be raised or'lowered with respect to the secondary frame 21.

In the construction described above it will be seen that variable conditions affecting the gauge of'the rubber stock delivered between rolls 11 and 12 have been eliminated. The weight of secondary frame 21, together with the rolls 12 and 13 carried by it, is at all times carried by the posts 36. The reaction pressure of the stock being sheeted between the rolls 11 and His also resisted by the posts 36. Even though there were lost mo tion between the head 35 of Post 36 and the ofthe parts and the pressure of the stock,

cap 34, no variation in the gauge of the finished product could result, as this lost motion is always taken up by the weight both acting in the same direction.

In use a feed of rubber 48is placed between rolls 10 and 11 and a feed 49 between 'the rolls 12 and 13. The rolls are then caused to rotate by the usual gearing, indicated in Fig. 1, in the direction of the arrows in Fig. 2. This results in sheeting out 'be combined with woven fabric or cords to produce 'a composite material. The importance of maintaining accuracy in the separa tion of rolls 11 and 12 is much greater than the importance of maintaining exact spacing between the outer pairs of rolls 10, 11 and 12 13, since it isthe spacing between rolls 11 and 12 thatdetermines finally the gauge of the ultimate product. The accuracy of this spacing has been thoroughly protected by the construction"described.

Having thus described my invention, I claim:

1. In a calender construction, aroll'fixed against vertical movement, a vertically movable roll located above the fixed roll, means for adjusting the vertical position of such roll, a vertically movable frame located below the fixed roll, means for adjusting the vertical position of the frame. a third roll adjacent the fixed roll and held againstvertical movement in said frame, a fourth roll vertically movable in the frame below the third roll, and means for adjusting'the verens it's tical position of the fourth roll relative to,

the frame 2. In 'a calender construction, a roll fixed against vertical movement, a vertically movable roll located above the fixed roll, means i able frame located below the fixed roll,

means foradjusting the vertical position of the frame, a second roll adjacent the fixed roll and held against vertical movement in said frame, a thirdroll vertically movable in the frame below the second roll, and means for adjusting the vertical position of the third roll relative to the frame.

4. In a calender construction, a roll fixed against vertical movement, a vertically mov able frame located below the fixed roll, a vertically adjustable pedestal upon which the frame rests and which serves to hold the frame in vertically adjusted position, a second roll located immediately below the fixed roll and held against vertical movement in the frame, a third roll-vertically movable in theframe below the second roll, and a pedestal vertically adjustable in, the frame and supporting the third roll from below.

. THOMAS MIDGLEYH 

